Libbitcoin Database
Bitcoin High Performance Blockchain Database
Make sure you have installed libbitcoin beforehand according to its build instructions.
$ ./autogen.sh
$ ./configure
$ make
$ sudo make install
$ sudo ldconfiglibbitcoin-database is now installed in /usr/local/.
About Libbitcoin Database
Libbitcoin Database is a custom database build directly on the operating system's memory-mapped file system. All primary tables and indexes are built on in-memory hash tables, resulting in constant-time lookups. The database uses sequence locking to avoid blocking the writer. This is ideal for a high performance blockchain server as reads are significantly more frequent than writes and yet writes must proceed without delay. The libbitcoin-blockchain library uses the database as its blockchain store.